Improvement



DANIEL A. JOHNSON, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT !N DEVICES FOR ATTACHING HUBS TO AXLES.

Specification forming part of Letters Patent No. 159,'762, datedFebruary 16, 1875; application filed January 16, 1875.

To all whom it may concern:

Be it known that I, DANIEL A. J oHNsoN, of Boston, in the county ofSut'folk and State of Massachusetts, have invented an Improved Method ofSecuringWheels to their Axles, of which the following is a full clear,and exact description, reference being had to the accompanying drawings,making part of this specification, in whichr Figure 1 is a perspectiveView of an axle and its box made in accordance with my in- Vention. Fig.2 is a longitudinal section through the center of the sane.

My present invention relates to that method of securing wheels to theiraxles in which one or more spiral springs are employed to preventconcussion and rattling of the parts, and is, in a nanner, animprovement on my patent of February 17, 1874; and this inventionconsists in a peculiar arrangement of springs at the outer end ot' theaXle, the springs being placed one on each side of the nut which secaresthe wheel in place, and being covered by a cap, which is screwed ontothe outer end of the aXle-boX, by which construction the concussion isrelieved longitudinally in both directions, and all rattling of partsavoided in a simple and effective manner.

To enable others skilled in the art to under stand and use my invention,I will proceed to describe the manner in which I have carried it out.

In the said drawings, A represents' a carriage-axle, over which fits theaxle-box B, which is held in place by an ordinary nut, O,

.screwed onto the outer end of the axle, and

provided with a fiange, d. The outer end of the aXle extends beyond theouter end of the axle-box, thus leaving a space between the latter andthe flange d for the reception of a spiral spring, e, which encirclesthe outer end of the axle, and is confined securely in place by the nutO, one end of the spring e hearing against the outer end of theaxle-box, and the other end hearing against the fiange d. On

the opposite side of this fiange the nut O is encircled by anotherspiral spring, f, one end of which bears against the tlan ge and theother end against the inside of a cap, D, which is screwed over the endof the aXle-box B, and thus, as the spring f is compressed by screwingon the cap, the inner end of the aXle-boX is drawn away from the collarg, as seen in Fig. 2, and is prevented by this spring from coming intosudden contact therewith, thus avoiding the concussion in this directionwhich would otherwise occur, while the concussion in the oppositedirection is relieved by the spring c, and all rattling of the parts isconsequently avoided, while no washers whatever are required.

Where a spring has been applied at each end of the aXle-boX to relievethe concussion in opposite directions, the chamber or recess forned byenlargin g the inner end of the axlebox for the reception of the springleft a portion of the inner end of the journal unsupported, and it wasliable to break at this point, which objection is entirely overcome byplacing both springs at the outer end of the journal, as no recess orchanber at the inner end of the aXle-boX is then required.

The screw-cap D excludes dust, and prevents the escape of the oil orother lubricating substance used, and the compression and expansion ofthe spring e assist in distributing it over the surface of thejournal.

What I clain as my invention, and desire to secure by Letters Patent, is

The springs e f, placed at the outer end of I the axle A, one on eachside of the nut O se cured thereto, in combination with the screwcap Dand axle-box B, to operate substantially as and for the purpose setforth.

Witness my hand this 13th day of January,

DANIEL A. J OHNSON. In presence of P. E. TESCHEMAGHER, N. W. STEARNS.

